Global Microsoft outage disrupts key services for millions of users

On Thursday, November 12, 2026, a major service outage hit Microsoft 365, affecting Outlook, Teams, and Copilot users globally. At its peak, the platform Downdetector recorded nearly 140,000 reports of issues across 74 countries. The disruption hindered operations for government agencies, financial institutions, and major corporations in regions including the United States, Japan, Australia, Singapore, and the United Kingdom. Microsoft attributed the failure to overloaded infrastructure after specific servers went offline, causing a cascade effect. The company explicitly stated that it is not aware of any malicious activity or cyber-security breach.

By Friday, the outage had stretched beyond 12 hours, impacting critical communication lines and forcing some organizations to revert to traditional methods like fax machines and telephones. Microsoft noted that recovery efforts were complex, as initial server adjustments failed to result in immediate, sustained service restoration. While some services showed partial recovery, technical instability persisted, and the company continued to evaluate further stabilization actions. This incident marks the second major disruption to Microsoft 365 services this year. Experts emphasize that the failure highlights the systemic risks associated with over-reliance on a single cloud service provider for essential global infrastructure.